12.09.05
Patent No. US 6,887,840 B2: Milborn Enterprises LLC, Artesia, NM, patented an iron sulfide cleaning composition consisting of formaldehyde or glutaraldehyde, methanol, 2-butoxyethanol, isopropyl alcohol, hydrochloric acid, surfactant intermediate, surfactant/corrosion inhibitor, glacial acetic acid and water.